THE RUBBER AROUND MY CAR DOOR STICKS, SOUNDS SQUISHY WHEN I OPEN IT. on 2003 Honda Accord

THIS HAPPENS EACH TIME I OPEN THE DOOR AND SEEMS TO BE GETTING WORSE. I SPRAYED IT ALL WITH WD 40 BUT IT DIDN'T SEEM TO MAKE ANY DIFFERENCE. THE CAR SAT IN 100+ TEMPERATURES FOR ALL THOSE 60+ DAYS IN AUSTIN PARKING LOT. DOES IT NEED REPLACING? HOW MUCH WILL THAT COST FOR DRIVER DOOR?

Thanks. I will definitely do that. Nothing burst within the car, although a soda spilled when the bottom fell out of the paper cup that held it. It spilled all over the driver's seat and I scrubbed it up with towels from the car's trunk. I wiped down everything till it looked like nothing happened. But, I never thought of wiping the rubber part. Maybe that is the problem. That would be great! Yeah! Thanks, again.